Operating device for oven shelves



1937- c H. GERWIG ET AL OPERATING DEVICE FOR OVEN SHELVES Filed March 11, 1936 2 Sheets-Sheet 1 Cfirlsflan H Ger/411 9 INVENTOR 21 uuuuflqunmu"-- J3Z7J4J7 J5 23 21 J6 A 15 26' J5 J6 m w y M m-mausvg c. H. GERWIG ET AL ,706

OPERATING DEVICE FOR OVEN SHELVES Feb. 2, 1937.

Filed March 11, 1936 2 Sheets-Sheet 2 a (ZH'Jfi'a/IJY. em 1'9 INVENTOR ATTORNEYS Patented Feb. 2, 1937 UNITED STATES PATENT OFFICE OPERATING DEVICE FOR OVEN SHELVES Christian Harley Gerwlg and Alva H. Ger-wig,

Chapel, W. Va.

Application March 11, 1936, Serial No. 68,314

1 Claim.

The invention relates to an operating device for-oven shelves and more especially to an oven door operated device for the moving of the shelf within the oven.

The primary object of the invention is the provision of a device of this character, wherein on operating the door of an oven the shelf within the said oven will be manipulated to bring the same to a position when the door is opened so that food stuff or material to be baked within the oven can be more readily placed upon the shelf and on the closing of the door the shelf will be carried into the oven, thereby eliminating the necessity of placing the hands within the oven when heated for the handling of the food stuif or material to be baked.

Another object of the invention is the provision of a device of this character, wherein the same is automatically operated on the manual opening and closing of the door of an oven for the projecting and receding of a shelf as within said oven, the device being of novel construction in its entirety.

A further object of the invention is the pro-- vision of a device of this character which is simple in construction, thoroughly reliable and efiicient in its operation, automatic in action, strong, durable, and inexpensive to manufacture and install.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawings, which disclose the preferred embodiment of the invention and pointed out in the claim hereunto appended.

In the accompanying drawings:

' Figure 1 is a fragmentary vertical sectional view through an oven showing the device constructed in accordance with the invention installed therein and the oven door being in closed position.

Figure 2 is a sectional view on the line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is a view similar to Figure 1 showing the oven door open and the shelf projected.

Figure 4 is a perspective view of an oven showing its door open and the shelf projected, the oven body being partly broken away for illustrating adjuncts.

Similar reference characters indicate corresponding parts throughout the several views in the drawings:

Referring to the drawings in detail, A designates generally an oven for baking purposes and is formed with an outer casing I having interiorly thereof a lining ll while at'the open front of this oven is arranged a vertically swinging door l2'which is manually controlled and is of conventional kind for the closing of the open front of said oven.

Arranged at the bottom of the oven A between the casing l0. and the vertical side walls of the lining II and made secure in any suitable man- 'ner are horizontally disposed tracks l3 upon which are slldably fitted toothed racks l4, these meshing with segmental gears l5 having their center journals l6 suitably fixed in the side walls of the casing I0 and to these journals are fixed cranks l1, these being for a purpose presently described.

At the forward end of each rack I4 is an upstanding arm l8 having an elongated slot iii to be traversed by a guide pin of a link 2| pivoted at 22 to a throw lever 23 which is fixed to the door l2. Thus it will be seen that when the door is swung in a vertical direction on its axis the racks l4 will be operated in unison sliding fore and aft on the tracks l3 and thus actuating the gears [5 for the turning of the cranks I1.

Pivoted at 24 to a shelf 25 within the oven A are rocking bars 26, these being also pivoted at 21 to the cranks ll of the gears i5 and said bars intermediate thereof are provided with elongated slots 28 accommodating guide pins 29 fixed to the vertical walls of the lining ll so that when the racks M are shifted the bars 26 are moved, whereby on the opening of the door l2 the shelf 25 will be projected through the open front of said oven A and on the closing of said door the shelf 25 will be retracted or moved inwardly into the baking compartment or chamber of the oven A as will be clearly apparent from Figures 1, 3 and 4 of the drawings.

The bars 26, gears l5, racks l4 and tracks l3 are located between the vertical side walls of the casing l0 and the vertical sidewalls of the lining I I of the oven A. Also the levers 23 operate through suitable clearances between the' ways for the pivots 24 connecting the bars 2' able racks operating said gears, arms carried by with the shelf 25. said door, slotted upstanding extensions on the What is claimed is: I racks, and links pivoted to the arms and llidabiy The combination with an oven having a front connected in the slots of the upstanding exten- 5 vertical swinging door, a shelf movably supported sions. 5

within the oven, rocking bars pivoted to said CHRISTIAN HARLEY GERWIG.

shelf, cranked gears pivoted, to said bars, shii't- ALVA H. GERWIG. 

